And 80 kg weight lifter holds 100 kg barbell directly above his head. According to the standard anthropometric tables, his limb segments weigh: both arms = 8 kg

torso and head = .56 x body weight

both legs = .32 x bodyweight

what are the joint reaction forces at the shoulders hips and ankles?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?